Remove use of deprecated OkHttp methods (close #228)#230

Paul Boocock (paulboocock) merged 1 commit intorelease/0.10.0snowplow/snowplow-java-tracker:release/0.10.0from

issue/228_remove_deprecated_okhttp_methodssnowplow/snowplow-java-tracker:issue/228_remove_deprecated_okhttp_methodsCopy head branch name to clipboard